What is MP4/M4V
A video compression standard planned for late 1998. MPEG-4 extends the earlier MPEG-1 and MPEG-2 algorithms with synthesis of speech and video, fractal compression, computer visualisation and artificial intelligence-based image processing techniques.
MPEG.ORG is an excellent source for additional information on MPEG format and usage.
What is WAV
The format for storing sound in files developed jointly by Microsoft and IBM. Support for WAV files was built into Windows 95 making it the de facto standard for sound on PCs. WAV sound files end with a.wav extension and can be played by nearly all Windows applications that support sound.
How to Convert Mp4/M4v to Wav with Torrent All to Mp3/Wav Converter ?
1. To add Mp4/M4v source file.
Click on the "Add File" button on the tool bar. The standard file open dialog appears.
2. Select a section with button 
and 
to convert or convert the whole Mp4/M4v file.
3. Check in the boxes of the files that you'd like to do conversion. You can do batch conversion easily with Torrent All to Mp3 Converter.
4. Select Wave as output format.
5. Press the Convert button 
to start conversion from Mp4/M4v to wav file
6. Check on the conversion progress bar, press the Stop button if you want to stop
.
7. Open output file folder with play button 
.
find out its content with Browse button 
.